This may sound stupid but how does one increase their 'edge angle' when turning? Like what exercises should I do to have this locked down?

Not stupid at one point every snowboarder thought the same thing. Start pointing down hill and without body rotation start lifting your edge until your board starts to turn for you. As you turn continue to lift your edge until you start to travel uphill. On your heels sit back like your squatting. On your toes lean over your edge and push your shins into the tounge of your boot. Use a wide trail without many people on it. Pick up at least medium speed before you go into the turn and REMEMBER always lift your edge to much and fall toward the hill compared to letting your edge down and catching it.